The gpg error may be linked to a wrong date. Try as root:
then relaunch sbopkg.
Or maybe update the ca-certificates:
slackpkg upgrade ca-certificates
About the -current, don't waste time on it (unless you want to play with hardfloat), the build is...
the most pnd-compatible Slackware is the earliest one.
However, many pnd can be made functional with a symbolic link.
So you have to look the pnd logs in /tmp to see what's wrong.
-current is hardfloat, as opposed to Zaxxon (Pandora OS) which is softfloat, so almost every pnd will not...
The case and the cable must not be in contact.
We changed OP lcd cables so we know what friction does. What is worst here is that there will be a lot more shoulder button presses that OP lid open/close...
But it can be fixed easily, so that's great.